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#12734692 - 04/28/18 05:27 PM Trim....speed.... best way?
Fish2222 Offline
Angler

Registered: 02/28/15
Posts: 449
Loc: East Texas
Ok....ignorant alert!

When I'm cruising at 25-35 mph....all good trimmed down tight.
If I want more speed I need to know tthe magic formula to keep bow up and rpm's right.
Any pointers?

150 hp
18' Fiberglass
_________________________
"I only catch the ones that bite"
BassCat Sabre
Suzuki EFI 150 Super Six

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#12734695 - 04/28/18 05:31 PM Re: Trim....speed.... best way? [Re: Fish2222]
SteezMacQueen Online   sleepy
TFF Celebrity

Registered: 11/02/14
Posts: 5782
Loc: Red Oak, Galveston, and Pagosa...
Floor it! Trim up for faster, trim down for slower.
_________________________
Eat. Sleep. Fish.

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#12734700 - 04/28/18 05:42 PM Re: Trim....speed.... best way? [Re: Fish2222]
Ken A. Offline
TFF Celebrity

Registered: 10/02/06
Posts: 9927
Loc: Trophy Club, TX
Originally Posted By: Fish2222
Ok....ignorant alert!

When I'm cruising at 25-35 mph....all good trimmed down tight.
If I want more speed I need to know tthe magic formula to keep bow up and rpm's right.
Any pointers?

150 hp
18' Fiberglass


Here are some pointers. Trim down all the way to take off. After the boat gets on plane, bump the trim up a little at a time. You will feel the bow begin to rise and the speed will increase without adding throttle. Trim up until the boats begins to porpoise. Then bump it down a couple times until the porpoise stops. Now you are set to go.

The trim changes the attitude of the prop in the water and lifts the hull free so there is less wetted surface that creates drag on the water. Less drag equals more speed and more efficiency. So you will also burn less fuel if you are trimmed for optimum performance.

If you are running WOT and you are trimming the motor up and you begin to notice the boat starts to chine walk, bump the down button a couple times to get it to settle down. Your boat should be capable of low to mid-60's if it is set up properly and has the right prop on it.

Also watch the tach on the dash. Do not exceed 6,000 rpms as this could be too high for your motor. If you exceed 6,000 rpms, you need a higher pitch prop. They are rated in "diameter and inches of pitch." An 18' boat with a 150 probably has a 21" to 23" pitch prop.

A good rule of thrumb is the lower the pro pitch, the better the holeshot but it costs you speed on topend. The higher pitch props are typically slower out of the hole but faster on the topend.


Edited by Ken A. (04/28/18 05:46 PM)

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#12734788 - 04/28/18 07:11 PM Re: Trim....speed.... best way? [Re: Ken A.]
SteezMacQueen Online   sleepy
TFF Celebrity

Registered: 11/02/14
Posts: 5782
Loc: Red Oak, Galveston, and Pagosa...
Originally Posted By: Ken A.
Originally Posted By: Fish2222
Ok....ignorant alert!

When I'm cruising at 25-35 mph....all good trimmed down tight.
If I want more speed I need to know tthe magic formula to keep bow up and rpm's right.
Any pointers?

150 hp
18' Fiberglass


Here are some pointers. Trim down all the way to take off. After the boat gets on plane, bump the trim up a little at a time. You will feel the bow begin to rise and the speed will increase without adding throttle. Trim up until the boats begins to porpoise. Then bump it down a couple times until the porpoise stops. Now you are set to go.

The trim changes the attitude of the prop in the water and lifts the hull free so there is less wetted surface that creates drag on the water. Less drag equals more speed and more efficiency. So you will also burn less fuel if you are trimmed for optimum performance.

If you are running WOT and you are trimming the motor up and you begin to notice the boat starts to chine walk, bump the down button a couple times to get it to settle down. Your boat should be capable of low to mid-60's if it is set up properly and has the right prop on it.

Also watch the tach on the dash. Do not exceed 6,000 rpms as this could be too high for your motor. If you exceed 6,000 rpms, you need a higher pitch prop. They are rated in "diameter and inches of pitch." An 18' boat with a 150 probably has a 21" to 23" pitch prop.

A good rule of thrumb is the lower the pro pitch, the better the holeshot but it costs you speed on topend. The higher pitch props are typically slower out of the hole but faster on the topend.


That's what I said! .....well.....sort of.
_________________________
Eat. Sleep. Fish.

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#12735098 - 04/28/18 11:40 PM Re: Trim....speed.... best way? [Re: SteezMacQueen]
T-racer Offline
Pro Angler

Registered: 08/24/16
Posts: 773
Loc: Melissa, Tx
Originally Posted By: SteezMacQueen
Originally Posted By: Ken A.
Originally Posted By: Fish2222
Ok....ignorant alert!

When I'm cruising at 25-35 mph....all good trimmed down tight.
If I want more speed I need to know tthe magic formula to keep bow up and rpm's right.
Any pointers?

150 hp
18' Fiberglass


Here are some pointers. Trim down all the way to take off. After the boat gets on plane, bump the trim up a little at a time. You will feel the bow begin to rise and the speed will increase without adding throttle. Trim up until the boats begins to porpoise. Then bump it down a couple times until the porpoise stops. Now you are set to go.

The trim changes the attitude of the prop in the water and lifts the hull free so there is less wetted surface that creates drag on the water. Less drag equals more speed and more efficiency. So you will also burn less fuel if you are trimmed for optimum performance.

If you are running WOT and you are trimming the motor up and you begin to notice the boat starts to chine walk, bump the down button a couple times to get it to settle down. Your boat should be capable of low to mid-60's if it is set up properly and has the right prop on it.

Also watch the tach on the dash. Do not exceed 6,000 rpms as this could be too high for your motor. If you exceed 6,000 rpms, you need a higher pitch prop. They are rated in "diameter and inches of pitch." An 18' boat with a 150 probably has a 21" to 23" pitch prop.

A good rule of thrumb is the lower the pro pitch, the better the holeshot but it costs you speed on topend. The higher pitch props are typically slower out of the hole but faster on the topend.


That's what I said! .....well.....sort of.


LOL right idea
_________________________
Bullet 20XDC - Merc 250XS
Mallard Marine Trenton, Tx

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#12735378 - 04/29/18 10:24 AM Re: Trim....speed.... best way? [Re: Fish2222]
coachallentca Offline
TFF Team Angler

Registered: 11/19/08
Posts: 4386
Loc: crowley
watch your water pressure when trimming. If you go to high your water pressure will drop to low and that would not be good.
_________________________


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#12735385 - 04/29/18 10:31 AM Re: Trim....speed.... best way? [Re: Fish2222]
Hog Jaw Offline
Extreme Angler

Registered: 06/09/08
Posts: 2584
Loc: The Great State of Texas
I watch the nose of the boat , listen to motor , feel of the steer wheel .

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#12735969 - 04/29/18 09:09 PM Re: Trim....speed.... best way? [Re: T-racer]
Ken A. Offline
TFF Celebrity

Registered: 10/02/06
Posts: 9927
Loc: Trophy Club, TX
Originally Posted By: T-racer
Originally Posted By: SteezMacQueen
Originally Posted By: Ken A.
Originally Posted By: Fish2222
Ok....ignorant alert!

When I'm cruising at 25-35 mph....all good trimmed down tight.
If I want more speed I need to know tthe magic formula to keep bow up and rpm's right.
Any pointers?

150 hp
18' Fiberglass


Here are some pointers. Trim down all the way to take off. After the boat gets on plane, bump the trim up a little at a time. You will feel the bow begin to rise and the speed will increase without adding throttle. Trim up until the boats begins to porpoise. Then bump it down a couple times until the porpoise stops. Now you are set to go.

The trim changes the attitude of the prop in the water and lifts the hull free so there is less wetted surface that creates drag on the water. Less drag equals more speed and more efficiency. So you will also burn less fuel if you are trimmed for optimum performance.

If you are running WOT and you are trimming the motor up and you begin to notice the boat starts to chine walk, bump the down button a couple times to get it to settle down. Your boat should be capable of low to mid-60's if it is set up properly and has the right prop on it.

Also watch the tach on the dash. Do not exceed 6,000 rpms as this could be too high for your motor. If you exceed 6,000 rpms, you need a higher pitch prop. They are rated in "diameter and inches of pitch." An 18' boat with a 150 probably has a 21" to 23" pitch prop.

A good rule of thrumb is the lower the pro pitch, the better the holeshot but it costs you speed on topend. The higher pitch props are typically slower out of the hole but faster on the topend.


That's what I said! .....well.....sort of.


LOL right idea


roflmao

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#12736269 - 04/30/18 07:57 AM Re: Trim....speed.... best way? [Re: Fish2222]
FlatBack4 Offline
Outdoorsman

Registered: 10/29/16
Posts: 172
Loc: Fairview, TX
Well, you could follow the instructions provided by all the engineer-types above, or just full throttle out of the hole, when you're on plane, trim up until you stop seeing water spray out of the corner of your eye. If you start porpoising (front-end bouncing), trim it down until the porpoising stops.

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#12736300 - 04/30/18 08:12 AM Re: Trim....speed.... best way? [Re: FlatBack4]
Ken A. Offline
TFF Celebrity

Registered: 10/02/06
Posts: 9927
Loc: Trophy Club, TX
Originally Posted By: FlatBack4
Well, you could follow the instructions provided by all the engineer-types above, or just full throttle out of the hole, when you're on plane, trim up until you stop seeing water spray out of the corner of your eye. If you start porpoising (front-end bouncing), trim it down until the porpoising stops.


I'm about the furthest thing from an Engunear you ever met. After owning 28 boats since 1974, I have been there/done that a fair amount.
wink


Edited by Ken A. (04/30/18 08:13 AM)

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#12736350 - 04/30/18 08:43 AM Re: Trim....speed.... best way? [Re: Ken A.]
FlatBack4 Offline
Outdoorsman

Registered: 10/29/16
Posts: 172
Loc: Fairview, TX
Originally Posted By: Ken A.
Originally Posted By: FlatBack4
Well, you could follow the instructions provided by all the engineer-types above, or just full throttle out of the hole, when you're on plane, trim up until you stop seeing water spray out of the corner of your eye. If you start porpoising (front-end bouncing), trim it down until the porpoising stops.


I'm about the furthest thing from an Engunear you ever met. After owning 28 boats since 1974, I have been there/done that a fair amount.
wink


Actually, I am an engineer-type. My comment above was done completely tongue-in-cheek.

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#12736424 - 04/30/18 09:27 AM Re: Trim....speed.... best way? [Re: Fish2222]
Sinkey Offline
Tidy Scoop

Registered: 08/04/06
Posts: 4992
Loc: Frisco, TX. and Lake Fork
I start lifting it as soon as she's out of the hole!
_________________________

903-LAKE FORK MAFIA
www.grandebass.com
www.skeeterboats.com
www.diamondsportsmarine.com




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#12736484 - 04/30/18 10:06 AM Re: Trim....speed.... best way? [Re: FlatBack4]
Ken A. Offline
TFF Celebrity

Registered: 10/02/06
Posts: 9927
Loc: Trophy Club, TX
Originally Posted By: FlatBack4
Originally Posted By: Ken A.
Originally Posted By: FlatBack4
Well, you could follow the instructions provided by all the engineer-types above, or just full throttle out of the hole, when you're on plane, trim up until you stop seeing water spray out of the corner of your eye. If you start porpoising (front-end bouncing), trim it down until the porpoising stops.


I'm about the furthest thing from an Engunear you ever met. After owning 28 boats since 1974, I have been there/done that a fair amount.
wink


Actually, I am an engineer-type. My comment above was done completely tongue-in-cheek.


You didn't use the little winky face emoji! lol_2

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